Rock-drilling apparatus.



W. A! SMITH BUCK DHHUNG APPARATUS.

APPLicMmH FiLED fit-1.211926 Pufentvd Feb. 6, 1917.

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W. A. SMITH.

ROCK [mums APPARATUS.

APPLICAUON HLEI) MB SHEET 2 Patented Feb. 6, 1917.

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W. A. SMITH.

ROCK DRiLLING APPARATUS.

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ROCK DRILLING APPARATUS.

APPLICATION FILED FEB. 23, I916.

atmweq \w fl -M m e" m Patented Feb. 6, 1917.

4 SHEETSSHEET 4 UNITED STATES PATENT OFFICE.

WILLIAIM A. SMITH, OF DENVER, COLORADO, ASSIGNOR TO THE DENVER ROCK DRILL MANUFACTURING COMPANY, OF DENVER, COLORADO, A CORPORATION OF DELA- WARE.

ROCK-DRILLING APPARATUS.

Application filed February 23. 1916.

To all whom it may concern:

Be it known that 1, WILLIAM A. SMITH, a citizen of the United States, residing at Denver, in the county of Denver and State of Colorado, have invented certain new and useful Improvements in Rock-Drilling Apparatus, of which the following is a specilication.

'i be present invention relates to rock drilling apparatus, and more particularly of the t y pc set forth in my copending application. Serial No. (55,794, filed December 27, llJlfi.

(in-e oi the objects of the present invention is to provide a structure that is more compact and highly effective.

further object is to provide means whereby the mechanism can be utilized as a device for manually turning the drilling apparatus.

Another object is to provide mechanism wln-rebv the exhaust from the turning motor is utilized to keep the bearings clear of dirt and dust, thereby preventing excessive wearing.

Another and important object is to pro vide a holding handle which also constitutos means for controlling the supply of llllltllt' lluid to the turning motor, said handhbeing so constructed and arranged that it released. the fluid supply is automatirally rut oll'. thereby avoiding danger of damage and injury to the operator.

in illt emladin'ieut disclosed, Figure 1 is side ill ation of the apparatus in assembled condition. the parts being broken away. Fig. 2 is a vertical longitudinal sectional view on a a enlarged scale through the motor. Fig- I} is a horizontal sectional view. Fig. -l is a sectional view on the line 1-4 of Fig. .i. Fig. .3 is a cross sectional view through the motor. Fig. (i is a. detail perspective view oi the piston. Fig. 7 is a similar view of the distributing valve. Fig. 8 is a detail sectional view on an enlarged scale of the throttle valve and associated parts. Fig. 9 is a cross Scti'tll nal view on the line 99 of Fig. 8. Fig. 10 is a detail sectional view through a portion of the throttle valve and its seat. showing the lubricant discharge port. Fig. 11 is a detail sectional View illustrating the locking means for the gearing. Fig. 12 is a view at right angles to Fig. 11.

Similar reference numerals designate cor- Specifieation of Letters Patent.

Patented Feb. 6, 1917.

Serial No. 80,015.

'4 responding parts in all the figures of the drawings.

in the embodiment disclosed, drilling a pparatus of a well known type is illustrated, the same comprising a fluid-operated motor 13, provided at one end with a chuck for receiving a drill bit ll and having at its other end fluid-operated feeding means 15. Fluid is supplied to the motor and feeding means through a hose line 16 controlled by a throttle valve 1? in a manner well understood.

As in the above-mentioned case, the invention is shown in the form of an attachment, comprising a turning motor, this motor including a cylinder member 18 having an offset gear casing ll) composed of two parts held together by bolts 20.

Located in the gear casing is a gear wheel :21 carried by a. sleeve 22 that projects above the casing, having a rib 23 overlapping the upper edge thereof, said sleeve terminating in an outstanding flange 24 that is provided with holes through which the side bolts 35 of the drilling motor 13 pass. It will thus be seen that the sleeve 22 and consequently the gear 21 are rigidly allixed to the motor and all rotate in the gear case 19.

in the cylinder member 18 is a reciprocatory piston 26 provided between its ends with an integral rack 27 that meshes with the gear wheel 21, the cylinder member 18 and gear case 19 being in connnunication with each other. as will be clear by reference to Fig. 3 to permit such a meshing action. This piston is supplied with motive fluid through a tube 28 fixed to one end of the cylinder member and slidably received in a central lougitiu'linal chamber 29 formed in the piston. Located alongside the chamber :29. :Hljllfitllt one end thereof, is a valve chamber ill) having communication with the ehambe '39. through a port 31. Leading from the valve chamber 30 on opposite sides of the port 31 are supply and exhaust passages 32 and 33 that extend longitudinally in the pist n, and respectively open through the opposite ends thereof. Exhaust ports 3- and 35 communicate with the end portions of the valve chamber 30. and also communicate with external chambers 36 and 37 formed l)V cutting away the body of the piston 26 between its ends, these chambers being disposed on opposite sides of the rack 3i and having communication with the interior of the gear casing 19, as will be clearly evident bv reference to Fig. 5.

Operating in the valve chamber 30 a distributing valve 38 having a central cn largemcnt 39, end enlargements it) and stems i1. and 42 that respectively project beyond the ends of the piston 26, said stem-s being arranged to respectively strike the heads of the cylinderuipon the reciprocation oi the piston.

The two cylinder heads are respectively designated 43 and it and are held upon the body of the cylinder by side bolts i One of these cylinder heads it is enlarged and provided with a lubricant-holding reservoir sill, through the center of which is formed a conduit 47 communicating with the tube :28. A lateral port l8 opens through one side of the cylinder head it and connunni- Hit-.5 with the conduit ii, said port rccciving a suitable coupling by which a motive fluid supply line i9 can be connected thereto. The conduit 17 is provided with a taper valve seat 50, and as shown more ptll'iiljlh larly in Fig. 10, a discharge port 51 from the lubricant reservoir i6 opens into this valve seat.

The cylinder head ii also carries a handle. This handle comprises a stem 52, one end of which is threaded into the outer end of the head ii, the other end being externally threaded, as illustrated in Fig. 2. The stem has a longitudinal opening thcrethrough in which is slidably mounted a plug valve 5-3 that is movable into and out of coaction with the seat 50, to not only control the passage of motive fluid through the tube and thence into the piston, but also th sup ply of lubricant through the port 51. The outer end of the valve stem 5 is secured to a Washer 5i dctachably but nonrotatably engaged in the outer end of a handle grip 55 mounted upon the outer end of the stem The said stem 52 terminates short oil the washer forming an internal chamber. in uhich is located a coiled spring 136. ()nc end of this spring, as shown at 57. is engaged in the end oi the stem [12, the other end in of said spring passing through the washer Fi l and being engaged in an opening fil in the cud oi the handle grip.

iv referring to Figs. '3 and 3. it will inseen that the tube 2b. is held in p ace by having a flange at its outer end, which is clamped between a head dish G1. and the cylinder head ii, a packing washer 432 being arranged against the flange to prevent leakage. It. will also be seen by reicrence to Fig. 9 that lubricant can be supplied to the reservoir 46 through an opening 63 normally closed by a removable plug til threaded thereinto.

It is believed that the operation ofthe device can now be made clear. hen in position on drilling apparatus. as shown in Fig. 1 and as already explained, the gear 21 is fixed against movement with respect to said drilling apparatus. If motive fluid supplied through the line it), it will enter the conduit *7, but as the normal position of the valve is a closed one, this motive fluid cannot pass into the tube 28. In the operation of the device, the handle 55 is grasped by the operator to hold the motor against turning, and it vviil be noted that this bandle also constitutes means for controlling the supply of motive fluid to the motor. To admit such fluid, the operator turns the grip 5.) and thus moves the same on the stem 52. As a consequence the valve 53 will move vrith it and be unseatcd to any extent do sired. When the valve is thus opened, the motive fluid will pass through the tune 25 into the chamber 29, and thence into the valve chamber 3t"). i ssuming the parts. as shown in Fig. 2, it will be seen that the motive [luid will pass through the port 32 and enter the cylinder behind the piston, thereby moving said piston to the left. The exhaust vvill take p ace through. the channel 33, port and chamber 3T. its the piston approaches the end of its left hand stroke, the stem 4:2 will strike the cylinder head and the who will be shifted, whereupon the motive fluid from the valve chan'iber 80 will pass through the channel 323, while the ex: haunt will now take place through the channel 322, port 3i and chamber 36. The piston vxill thus be reversed in its movemei'lt and be returned to the position illustrated in Fig. 2. The reciprocation oi the piston through the medium of the rack QT and gea r 31 will cause the oscillation of the drilling apparatus, and in this connection, it will be noted that the exhaust will pass into the gear case 19 around the gear and escape through the joints of said gear vase, these joints being snllicieutly open to permit its ready escape, As a consequence, the dirt and dust will be b own aivay from the gear case. and the interior with the gearing and bearings kept free therefrom. When the valve 53 is opened. it will be evident by ref crence to Fig. 10 that the lubricant port 51 will also be opened. and consequently a smzll amount of luhr'rant will be continizall v passing with the motive fluid into the machine and find its way to all the parts. inasmuch as the opening of the valve places trnsion on the spring 513. it Will be evident that. it the handle is released by accident or otherwise, the handle grip will be automati cally turned by the spring to again close the valve. Consequently it an accident should happen and the operator lose hold upon the handle grip, the motor Will automatically stop and danger from an uncontrolled op erating device will thereby be eliminated.

It may sometimes be desirable to turn the drilling apparatus by hand, and in order that this maybe done, means-are provided for locking the turning motor to the gear 21, so that said motor with the handle will be rigidly fixed with respect to the drilling apparatus. In the present embodiment, this locking means is shown in the form of a rotary cam element 65journaled in the gear case 19 at its juncture with the cylinder 27, and having a central cut-away portion 66, which when turned to the proper position, will permit the passage of the gear teeth, as shown in Fig. 11. If, however, the device is given a half turn, the cam will pass between two of the teeth and thus prevent the relative rotation of the gear wheel 21 and the motor. This locking device, not only has a rotary movement, but it is also capable of longitudinal movement. It is provided at one end with a finger grip 67 and at its other end with a cross pin 68 that is arranged to engage in notches 69 formed in the lower portion of the casing in which the device is rotatably mounted. A coiled spring 70, interposed between the finger piece 67 and the casing, serves to hold the cross pin 68 in the notches, and thus lock the device, both in its operative and in its inoperative positions.

From the foregoing, it is thought that the construction, operation and many advantages of the herein described invention will be apparent to those skilled in the art, without further description, and it will be understood that various changes in the size, shape, proportion and minor details of con struction may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

Having thus fully described my invention, what I claim as new, and desire to sccure by Letters Patent, is:--

1. The combination with drilling apparatus, of a motor movably mounted on the drilling apparatus forturning the same, means for supplying actuating fluid to the motor, and a common handle for holding the motor against turning with the drilling apparatus and controlling the supply of actuating fluid to the motor.

2. The combination with drilling apparatns, of a motor movably mounted on the drilling apparatus for turning the same, means for supplying actuating fluid to the motor, a device controlling the actuating fluid supply to the motor, and a handle for holding the motor against turning with the drilling apparatus, said handle being movable on the motor and controlling the supply of actuating fluid thereto.

3. The combination with drilling apparatus, oi a motor movably mounted on the drilling apparatus for turning the same, means for supplying actuating fluid to the motor, a valve controlling the fluid supply to the motor, and a handleconnected to the motor for holding the latter against turn ing, said handle being rotatably mounted on the motor and having a connection with the valve for operating it.

4. The combination with drilling appa ratns, of a motor movably mounted on the drilling apparatus for turning the same, means for supplying'actuating fluid to the motor, a common handle for holding the motor against turning with the drilling apparatus and controlling the supply of actuating fluid to the motor, and means for normally maintaining the handle in-a position to out off the supply of fluid to the motor.

5. The combination with drilling apparatus, of a motor movably mounted on the drilling apparatus for turning the same, means for supplying actuating fluid to the as motor, a device controlling the actuating fluid supply to the motor, a handle for holding the motor against turning with the drilling apparatus, said handle being movable on the motor and controlling the supply of 9a actuating fluid thereto, and means for yieldingly maintaining the handlein a position to cut oil the supply of fluid to the motor and cause it to assume such position when in released condition.

6. The combination with drilling apparatus, of a motor movably mounted on the drilling apparatus for turning the same, means for supplying actuating fluid to the motor, a valve controlling the fluid supply to the motor, a handle connected to the motor for holding the latter against turning, said handle being rotatably mounted on the motor and having a connection with the valve for operating it, and a spring connested to the handle for normally and yieldingly holding it in a position to maintain the valve closed.

T. The combination with drilling apparatus, of a reeiprocatory motor disposed 11o transversely thereof and including a cylinder member, gearing between the motor and drilling apparatus for turning the latter trom the former. a handle projecting from one end of the cylinder member. means at said end for supplying motive fluid to the motor, said handle being rotatably mounted on the cylinder member, a valve connected to the handle and controlled thereby, and a spring engaged with the handle for normallv holding it with the valve in closed position.

8. The combination with drilling appara tus, of a handle therefor, said apparatus and handle being relatively rotatable. means other than the handle for turning the apparatus when said handle and apparatus are relatively rotatable, and means for locking the handle and drilling apparatus against relative rotation.

9. The combination with drilling apparatus, of a handle therefor, said apparatus and handle being relatively rotatable, means movably mounted on the handle for turning the drilling apparatus, and means for locking the handle and drilling apparatus against relative rotation. to permit the latter being manually turned.

10. The combination with drilling apparatus having a gear element, of a motor in cluding a gear element coacting with said first gear element, means for loclring the gear elements to hold the motor and drilling apparatus against relative morement, and means for turning the apparatus when the gears are so locked.

ll. lhe combination with drilling apparatus, of a gear element thereon, a motor having a rotatable mounting on the drilling apparatus and including a gear element co acting with the first-mentioned gear element, and means engaging one of the gear elements for holding the drilling apparatus and motor against relative movement, said motor being rotatable with the apparatus When so held against relative movement.

12. The combination with rotatable drilling apparatus, of a gear thereon, a motor disposed transverselv of the drilling apparatus and including a gear element coacting with the first mentioned gear, a rotatable locking device mounted on the motor and having a. portion arranged to engage the teeth of the gear on the drilling apparatus to lock the motor and drilling apparatus against relative rotation, and a handle on the motor for holding the same and for manually turning the drilling apparatus when locked.

13. The com ination with drilling apparatus, ot a gear fixed thereto, a cylinder memher disposed transversely of the drilling apparatus, and a reciprocatory piston operating in the cylinder member and having a reel; between its ends meshing with the gear for turning the drilling apparatus.

l t. The combination with drilling apparatus. ot a ear fixed thereto. a. cylinder member disposed transversely of the drilling apparatus, a reciprocatory piston operating in the cylinder member and having a rack between its ends meshing with the gear, and a handle grip projecting from the cylinder memlrer for holding the same against turning with the drilling apparatus.

15. The combination with drilling apparatus, of a turning motor therefor, gearing between the motor and drilling apparatus for effecting the turning movement of the lat ter, and means for directing the exhaust from the motor against the gearing.

1G. The combination with drilling apparatus, of a turning motor therefor, gearing between the motor and drilling apparatus for efiecting the turning movement of the latter, a casing for the gearing, and means for directing the exhaust from the motor into and through the gear casing.

17. The combination with drilling apparatus, of a gear surrounding the same, a motor cylinder including a gear casing surrounding the gear and motor, said drilling apparatus being rotatable in the gear casing, a reciprooatory piston in the cylinder member having a rack meshing with the gear, means for supplying motive fluid to the cylinder member, and means for directing the exhaust from the cylinder member through the gear casing.

18. As an attachment, a tubular gear having means for attachment to drilling apparatus, a cylinder member having a gear casing in which the gear is rotatably mounted, a piston operating in the cylinder member and having a rack between its ends meshing with the gear, means for supplying motive fluid to the cylinder member, and a handle on. one end of the cylinder member for holding it, said handle constituting means for controlling the fluid supply.

19. The combination with drilling apparatus, of a motor for turning the same, a handle for manually turning the drilling apparatus, said drilling apparatus being rotatable with respect to the handle when the turning motor is in operation. and means for locking the handle and drilling apparatus against relative rotation to permit the mannal rotation of the latter by the handle.

90. The combination with drilling apparatus, of a handle for manually turning the same, said handle lntving rotatable engage ment with the apparatus, a motor for auto matically turning the drilling apparatus, said motor having a gear connection with the drilling apparatus, and means for securing the drilling apparatus and handle against relative rotation to permit the drilling apparatus to be manually rotated through the medium of the handle.

In testimony whereof I allix my signature in the presence of two witnesses.

WILLIAM A. SMITH.

\Vitnesses JOHN B. Ennnnoonr, CHARLES E. KAISER.

Copies of this patent may be obtained for live cents each, by addressing the Commissioner of Patents, Washington, D. 0.

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